生态学杂志2024，Vol.43Issue(6)：1779-1788,10.DOI:10.13292/j.1000-4890.202406.029
雅鲁藏布江中上游浮游植物功能群季节演替特征对水环境的指示作用
Seasonal succession characteristics of phytoplankton functional groups in the middle and upper reaches of the Yarlung Zangbo River as an indicator of water environment
摘要
Abstract
The functional group composition of phytoplankton can reveal community succession pattern and indicate the quality of water environment.The Yarlung Zangbo River is an important water system in China.The phytoplank-ton community structure and water environmental factors in the middle and upper reaches of the Yarlung Zangbo River were investigated in August(summer)and November(autumn)of 2019 and in May(spring)of 2020 to ex-plore the seasonal variations of phytoplankton functional groups and their indicative roles on water environment.The results showed that:(1)Water in the middle and upper reaches of Yarlung Zangbo River was alkaline,with signi-ficant differences in water temperature,velocity and turbidity among the three seasons.(2)A total of 121 genera of phytoplankton were identified,belonging to 8 phyla,11 classes,24 orders,44 families.The phytoplankton commu-nity structure was diatomic-green algae-cyanobacteria type as a whole.The phytoplankton community could be di-vided into 28 functional groups with 16 dominant functional groups.The composition of phytoplankton functional groups varied obviously with seasons.(3)The results of redundancy analysis and variance partitioning analysis showed that water temperature,pH,and dissolved oxygen content were the main environmental factors influencing the distribution of dominant functional groups.(4)The comprehensive evaluation based on the Shannon index(0.56-3.09,with an average of 2.20)and the ecological status index(1.92-4.91,with an average of 3.63)in three seasons showed that water quality of the middle and upper reaches of the Yarlung Zangbo River was at the lev-el of"good".This study revealed the characteristics of phytoplankton functional groups and their indicative roles on water environment,and provided a scientific basis for aquatic ecological research in the middle and upper reaches of the Yarlung Zangbo River.关键词
雅鲁藏布江中上游/浮游植物功能群/季节演替/水环境状态Key words
the middle and upper reaches of Yarlung Zangbo River/phytoplankton functional group/seasonal suc-cession/state of water environment引用本文复制引用
巢欣,李晓东,杨清,刘惠秋,杨胜娴,巴桑..雅鲁藏布江中上游浮游植物功能群季节演替特征对水环境的指示作用[J].生态学杂志,2024,43(6):1779-1788,10.基金项目
国家自然科学基金项目(32070418)、2022年中央财政支持地方高校改革发展专项资金(藏财预指[2022]1号)和西藏大学研究生"高水平人才培养计划"项目(2021-GSP-S049)资助. （32070418）
